Chord · Altered Dom.
A7♯5♭9/11 — A Altered ♯5♭9 / 11th
A7♯5♭9/11 is the A altered ♯5♭9 / 11th chord. It is built on the root A with major 3rd (C♯), augmented 5th (E♯), minor 7th (G), minor 9th (B♭) and perfect 11th (D) above it — the formula 1 3 ♯5 ♭7 ♭9 11, sounding the notes A C♯ E♯ G B♭ D. On the piano it sits at A (octave 3) and above in the library's voicing; the same 6 notes in any octave are still A7♯5♭9/11.
- Root
- A
- Quality
- Altered ♯5♭9 / 11th
- Formula
- 1 3 ♯5 ♭7 ♭9 11
- Notes
- A C♯ E♯ G B♭ D
On the keyboard
The notes of A7♯5♭9/11
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | A | root | A3 |
| 3 | C♯ | major 3rd | C♯4 |
| ♯5 | E♯ | augmented 5th | E♯4 |
| ♭7 | G | minor 7th | G4 |
| ♭9 | B♭ | minor 9th | B♭4 |
| 11 | D | perfect 11th | D5 |
Other altered dom. on A
Altered ♯5♭9 / 11th chords on every root
Part of the chord reference. See also the scales and the keys.